Pd/Cu-Catalyzed aerobic oxidative aromatic C–H bond activation/N-dealkylative carbonylation towards the synthesis of phenanthridinones
作者:Renyi Shi、Huiying Niu、Lijun Lu、Aiwen Lei
DOI:10.1039/c6cc08701a
日期:——
A straightforward Pd/Cu-catalyzed oxidative C–H bond activation/N-dealkylative carbonylation of tertiary [1,1′-biphenyl]-2-anilines towards the synthesis of various biologically important phenanthridin-6(5H)-ones has been developed. A wide range of functional groups are well tolerated in this transformation.
Microwave assisted synthesis of phenanthridinones and dihydrophenanthridines by vasicine/KOtBu promoted intramolecular C–H arylation
作者:Sushila Sharma、Manoranjan Kumar、Shruti Sharma、Onkar S. Nayal、Neeraj Kumar、Bikram Singh、Upendra Sharma
DOI:10.1039/c6ob01362g
日期:——
simple, efficient, rapid and transition metal-free methodology has been developed by utilizing vasicine (a natural product), as a catalyst for the synthesis of phenanthridinones and dihydrophenanthridines. The reaction proceeds through intramolecular C–H arylation with aryl halides in the presence of KOtBu as a base under microwave irradiation in sulfolane as a solvent. The reaction proceeds well with various
Palladium-Catalyzed Annulation of Arynes by <i>o</i>-Halobenzamides: Synthesis of Phenanthridinones
作者:Chun Lu、Anton V. Dubrovskiy、Richard C. Larock
DOI:10.1021/jo3016192
日期:2012.10.5
The palladium-catalyzedannulation of arynes by substituted o-halobenzamides produces N-substituted phenanthridinones in good yields. This methodology provides this important heterocyclic ring system in a single step by simultaneous C–C and C–N bond formation, under relatively mild reaction conditions, and tolerates a variety of functional groups.
A new synthetic protocol has been developed by the implementation of the palladium-mediated benzylic C-H activation followed by tethered intramolecular arylation strategy to give linearly fused and unusually oxidized pyridocoumarin derivatives. oxidation - C-H activation - biaryl coupling - intramolecular cyclization - palladium acetate
Process for O-acylating thallus salts of 2-pyridone
申请人:——
公开号:US04020073A1
公开(公告)日:1977-04-26
Thallous salts of .beta.-dicarbonyl compounds, prepared by reaction of the .beta.-dicarbonyl compounds with a thallous alkoxide, are treated with alkyl halides to give C-alkyl products in high yield, with acyl halides at room temperature to give C-acyl products, and with acyl halides at low temperatures to give O-acyl products. Thallous phenolates are esterified with acyl or aroyl halides. Anhydrides are also prepared, as are biaryls and bi-sec-alkyls. N-heterocyclics, including purines and pyrimidines, are N-alkylated. Lactams are O-acylated or N-alkylated.